package com.bltec.emergency.common;

import com.bltec.emergency.utils.DateUtil;

import java.io.BufferedReader;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.text.SimpleDateFormat;

/**
 * MySQL数据库备份
 *
 */
public class MySQLDatabaseBackup {

    /**
     * Java代码实现MySQL数据库导出
     *
     * @author GaoHuanjie
     * @param hostIP MySQL数据库所在服务器地址IP
     * @param userName 进入数据库所需要的用户名
     * @param password 进入数据库所需要的密码
     * @param savePath 数据库导出文件保存路径
     * @param fileName 数据库导出文件文件名
     * @param databaseName 要导出的数据库名
     * @return 返回true表示导出成功，否则返回false。
     */
    public static boolean exportDatabaseTool(String hostIP, String userName, String password, String savePath, String fileName, String databaseName) throws InterruptedException {
        File saveFile = new File(savePath);

        if (!saveFile.exists()) {// 如果目录不存在
            saveFile.mkdirs();// 创建文件夹
        }
        if(!savePath.endsWith(File.separator)){
            savePath = savePath + File.separator;
        }
        File SQL = new File(savePath+fileName);
        if (SQL.exists()){
            fileName = DateUtil.now(new SimpleDateFormat("yyyy-MM-hh-HH-mm-ss"))+".sql";
        }
        PrintWriter printWriter = null;
        BufferedReader bufferedReader = null;
        try {
            printWriter = new PrintWriter(new OutputStreamWriter(new FileOutputStream(savePath + fileName), "utf8"));
            Process process = Runtime.getRuntime().exec(" mysqldump -h" + hostIP +" -P3305"+ " -u" + userName + " -p" + password + " --set-charset=UTF8 " + databaseName);
            InputStreamReader inputStreamReader = new InputStreamReader(process.getInputStream(), "utf8");
            bufferedReader = new BufferedReader(inputStreamReader);
            String line;
            while((line = bufferedReader.readLine())!= null){
                printWriter.println(line);
            }
            printWriter.flush();
            if(process.waitFor() == 0){//0 表示线程正常终止。
                return true;
            }
        }catch (IOException e) {
            e.printStackTrace();
        } finally {
            try {
                if (bufferedReader != null) {
                    bufferedReader.close();
                }
                if (printWriter != null) {
                    printWriter.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return false;
    }

/*    public static String runBackup(){
        try {
            if (exportDatabaseTool("47.92.226.52", "root", "BENLIU@888", "D:\\Software", "testSaveSql.sql", "emergency")) {
                return "数据库成功备份！！！";
            } else {
                return "数据库备份失败！！！";
            }
        } catch (InterruptedException e) {
            return e.getMessage();
        }
    }*/
}